Meraj N. Mirza received his Master degree from the Eastern Michigan University, USA in 1979 and he was Ph.D. Candidate, at University of California, Riverside, USA in 1982. He obtained Ph.D. from Khartoum University, Sudan in 1995. Since 1975, he has been affiliated with Umm Al-Qura University (UQU), Makkah (Mecca), Saudi Arabia. In 1997, he was one of the initiators of the GIS/Remote Sensing unit in (UQU), which is the pioneer GIS unit in Saudi universities. He is also an active associate of the Center of Research Excellence in Hajj and Omrah (HajjCORE), Umm Al-Qura University. He is a member in several research groups and specialized organizations such as: group of environmental assessment of natural hazard phenomena in Makkah, group of Al-Sharai, Makkah earthquake assessment, group of problems facing public services in mountainous areas of Makkah, Committee of 8th symposium on Geography in Saudi Arabia, Geography Department (UQU), Committee of observing and documenting maintenance works of holly Kaa’ba, Committee of naming streets and roads in Makkah city, and Committee of Makkah Haram boundary landmarks. Dr. Mirza is, also, a principal investigator of two funded research studies on (1) Flood hazard assessment on road networks in Makkah metropolitan area using 3D GIS, (2) Present and future impacts of land use and road network changes on increasing flood hazards in Makkah metropolitan area using a 4D GIS, sponsored by (HajjCORE). He has recently published The Illustrated Atlas of Makkah and the Holy Environs, and an Atlas of Makkah Maps. Currently, Dr. Mirza is a visiting professor at the Center for Geographic Analysis at Harvard University, USA for 2012-2013. During his visit, Dr. Mirza will attend seminars and workshops on historical GIS, and conduct research on historical GIS of Makkah and Saudi Arabia with CGA's WorldMap platform.